import java.util.Scanner;

public class LotteryOdds {
    public static void main(String[] args) {
        try (Scanner in = new Scanner(System.in)) {
            System.out.print("How many numbers do you need to draw? ");
            int k = in.nextInt();

            System.out.print("What is the highest number you can draw? ");
            int n = in.nextInt();

            int lotteryOdds = 1;
            for (int i = 1; i <= k; i++) {
                lotteryOdds = lotteryOdds * (n - i + 1) / i;
            }
            System.out.println("Your odds are 1 in " + lotteryOdds + ". Good luck!");
        }
    }
}
